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[Towertalk] Cable Clamps and Phillystran - NOT

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Subject: [Towertalk] Cable Clamps and Phillystran - NOT
From: (
Date: Wed, 7 Aug 2002 18:42:58 EDT
In a message dated 8/7/02 3:18:20 PM Pacific Daylight Time, 

> -if the Philly is really 1/2 inch I am not sure that grips
>  are specified for it.  

    There are specially made Preforms for Phillystran ONLY. They're longer 
and are designed for the jacket size and material. Other Preforms are 

    There are specific Preforms for 1/4" EHS; there are OTHER specific 
Preforms for 1/4" utility grade wire rope and they are different. Preforms 
are precision parts and can ONLY be used for the product they're designed for 
- NO mixing and matching. 

>  What I suspect is that 1/2 inch is the OD
>  of the jacket and it may be 3/8 inch EHS equiv.   That is
>  what I have that I got surplus from the AM broadcast industry.
>  I am not sure if it is that old or that large if preforms are
>  acceptable either.   This stuff may want the Socketfast Blue
>  potting compound.

    About 10 years or so Philadelphia Resins changed the jacket formula from 
the old stiff one that needed the sockets and potting resin to a softer PVC 
material. While you can probably use the sockets with the current version of 
Phillystran (I haven't checked with Phillystran on this), it's so much 
easier, faster and cleaner to use the Preforms. 

    The Preforms are the factory authorized Phillystran terminations while 
cable clamps are not. 
>  Just a thought--and what I wrote to Katz privately.  I think
>  the Philly owner should contact the company and get the true
>  scoop--based on the vintage.
    It's either stiff or you can tie it in a knot - that's the difference. He 
doesn't really need to contact Phillystran with that simple test. The aramid 
fibers are the same - they just changed the jacket material.  

Steve    K7LXC

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